MIL-DTL-3643B
4.3.1.6.1.1.1 Physical dimensions. To facilitate inspection of the physical dimensions, the
unassembled sample units shall be divided into groups of identical piece parts. Inspection of the physical
dimensions shall then be performed on a group-by-group basis.
TABLE VI. Group C inspection.
Examination or test
Requirement
Method
paragraph
paragraph
Subgroup 1 (unassembled connectors and associated fittings)
4.4.1
Visual and mechanical examination:
Design and construction:
4.3.1.6.1.1.1
3.3
Physical dimensions 1/
4.4.1.1 to 4.4.1.1.2, incl
3.3.3
Gage tests for contacts 2/
Subgroup 2 (assembled connectors and associated fittings)
Salt spray (corrosion)
4.4.3
3.5
1/ Only those dimensions related to piece parts (other than gage tests for contacts) shall be checked.
2/ This test is not applicable to associated fittings. In addition, test 3 of 4.4.1.1.1.3 is not applicable to
connectors UG-60E/U, -61E/U and -212C/U.
4.3.1.6.1.1.2 Acceptance criteria. No defects shall be permitted for piece parts. In addition, no defects
shall be permitted for material, plating of metal parts, and screw threads; and no failures shall be
permitted in the gage tests for contacts.
4.3.1.6.1.2 Subgroup 2 (assembled connectors and associated fittings). Six sample units of each type
connector and associated fitting shall be selected from the first lot produced. Thereafter, for each 500
connectors subsequently produced, one sample unit shall be selected. If any failures occur during this
test, the sample shall be rejected.
4.3.1.6.2 Disposition of sample units. Sample units, which have been subjected to group C inspection,
subgroup 2, shall not be delivered on the contract or order.
4.3.1.6.3 Noncompliance. If the unit fails to pass group C inspection, corrective action shall be taken to
remedy the manufacturing process, or the materials used in manufacturing the connectors, as warranted.
Corrective action shall be taken on all units of product produced prior to such corrective action, and
considered subject to the same failure. Acceptance of the product shall be discontinued until corrective
action, acceptable to the Government, has been taken. After the corrective action has been taken,
group C inspection shall be repeated on additional sample units (all inspection, or the inspection which
the original sample failed, at the option of the Government). Groups A and B inspections may be
reinstituted; however, final acceptance shall be withheld until the group C re-inspection has shown that
the corrective action was successful. In the event of failure after re-inspection, information concerning the
failure and the corrective action taken shall be furnished to the contracting officer.
4.3.1.7 Test equipment and inspection facilities. Test equipment and inspection facilities shall be of
sufficient accuracy, reliability, and quantity to permit performance of the required inspection to the
satisfaction of the Government.
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